Andrew earns 9 dollars per hour working part-time as a lab technician, he wants to earn more than 144 dollars this week. at least how many hours does Andrew have to work?

An an average person has 6×10 by the power of two as many red blood cells as white blood cells a small sample of the blood has 7×10 by the power of three white blood cells about how many red blood cells are in the sample

Choose the more precise measurement. 26.4 cm or 8.39 cm

Ahiker stands at an unknown elevation before he ascends 2 miles up a mountain to an elevation of 9 miles. find the elevation of the hiker before his ascent.